Peter Ginsberg, the attorney for Saints linebacker Jonathan Vilma, has served subpoenas to former Saints' defensive coordinator Gregg Williams and former assistant coach Mike Cerullo, CBSSports.com's Jason La Canfora confirmed Tuesday. ESPN first reported the story. The subpoenas are for a defamation suit against NFL Commissioner Roger Goodell.

Sources told La Canfora that Williams and Cerullo have a period of time to respond to being served, and then there is another window of 15-30 days allotted to schedule an actual date for the deposition to take place. In all likelihood, nothing happens until November.

Meanwhile, Vilma's legal team is seeking more information as part of their lawsuit against the league. The interviews would not be conducted in New Orleans, but rather where the men were served.

"Williams did admit to subsequently revamping the pay-for-performance program," La Canfora wrote Monday, "but said it did not put bounties out to injure opposing players within it, that no money was ever exchanged within that program for penalized hits, and Williams also noted that when linebacker Jonathan Vilma offered $10,000 to any teammate who knocked Vikings quarterback Brett Favre from the 2009 NFC Championship Game, it was done outside of the pay-for-performance system."

CBSSports.com's Mike Freeman confirmed that Vilma, in his meeting with the NFL on Monday, "…was indeed presented an affidavit from Williams in which Williams states bluntly that Vilma put a $10,000 bounty on Favre." But Freeman added that "Vilma continues to vehemently deny this fact and Vilma's camp questions the motives of Williams. Nonetheless, the statement from Williams is potentially damaging because it is Williams swearing under oath what he has previously just told the NFL's investigators."

Two of the three other players suspended by Goodell as part of the Saints bounty scandal -- Anthony Hargrove and Will Smith -- met with the commissioner Tuesday. La Canfora reports that Hargrove's meeting lasted roughly two hours and Smith was scheduled to begin his meeting afterwards. Several league officials, including Commissioner Roger Goodell, were a part of the discussion.

Goodell is expected to give his redetermination of his suspensions soon, possibly this week.

"Scott is committed to a just and fair resolution in this matter, but he is also committed to his teammates and his club," the NFLPA said in a statement. "He is still undergoing treatment for a knee injury and is preparing for this week's game. We scheduled a video conference with the league but they informed us that they were only interested in an in-person meeting."